GE 469

CHAPTER 2: INTRODUCTION
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 2–7
CT secondary: .................................................1 A or 5 A (specify with order)
Burden:................................................................Less than 0.2 VA at rated load
Conversion range:..........................................0.05 to 20 × CT
Nominal frequency: ......................................20 to 70 Hz
Frequency range: ..........................................20 to 120 Hz
Accuracy: ...........................................................at < 2 × CT: ±0.5% of 2 × CT
at ≥ 2 × CT: ±1% of 20 × CT
CT withstand: ..................................................1 second at 80 × rated current,
2 seconds at 40 × rated current, continuous at 3 × rated
current
RTD INPUTS
3 wire RTD Types: ..........................................100 Ω Platinum (DIN.43760), 100 Ω Nickel, 120 Ω Nickel,
10 Ω Copper
RTD sensing current: ....................................5 mA
Isolation:.............................................................36 Vpk (isolated with analog inputs and outputs)
Range:..................................................................–50 to +250°C
Accuracy: ...........................................................±2°C
Lead resistance: .............................................25 Ω Max per lead for Pt and Ni type; 3 Ω Max per lead for
Cu type
No sensor:..........................................................>1000 Ω
Short/low alarm: ............................................<–50°C
TRIP COIL SUPERVISION
Applicable voltage: .......................................20 to 300 V DC / V AC
Trickle current: ................................................2 to 5 mA
VOLTAGE INPUTS
VT ratio:...............................................................1.00 to 300.00:1 in steps of 0.01
VT secondary: .................................................273 V AC (full-scale)
Conversion range: .........................................0.05 to 1.00 × full scale
Nominal frequency: ......................................20 to 70 Hz
Frequency range: ..........................................20 to 120 Hz
Accuracy: ...........................................................±0.5% of full scale
Max. continuous: ...........................................280 V AC
Burden:................................................................>500 kΩ
Sensor supply: ................................................+24 V DC at 20 mA max.
2.2.2 Outputs
ANALOG CURRENT OUTPUT
Type:.....................................................................Active
Range:..................................................................4 to 20 mA, 0 to 1 mA
(must be specified with order)
Accuracy: ...........................................................±1% of full scale
Max. load:...........................................................4 to 20 mA input: 1200 Ω
0 to 1 mA input: 10 kΩ
Isolation:.............................................................36 V
pk
(isolated with RTDs and analog inputs)
4 Assignable Outputs: ..................................phase A, B, and C current; three-phase average current;
ground current; phase AN (AB), BN (BC), and CN (CA)
voltages; three-phase average voltage; hottest stator
RTD; hottest bearing RTD, hottest other RTD; RTDs 1 to 12;